Internal-combustion engine



Nov. 25, 1924. 1,516,649

C, R. SHORT INTERNAL COMBUSTION ENGINE Filed Oct. 15 1920 -flq F1 .4. ZEEEE'FE 7 M 5 m T 0%: 764M J ww g Patented Nov. 25, 1924..

nuns!) STATES PATENT OFFICE.

onanrns n. saonr, or Darren, on o, assronon r0 ennnaanno'rons nesnancn oonroaarron, or DAYTON, OHIO, a CORPORATION. or DELAWARE.

\ INTERNAL-COMBUSTION ENGINE.

To all whom it may concern:

Be it known that 1, CHARLES R. SHORT, a subject of the King of Great Britain, residing at Dayton, county of Montgomery, and State of Ohio, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a full, clear, and exact description.

The present invention. relates to internal combustion engines and in its preferred form, which form has been chosen for the purpose of description, relates specifically to engines of the air cooled type.

Among the objects of invention is to produce an en ine in which the cylinders have been cast slngly but which is of very rigid construction and which is lighter in weight than engines of the same type heretofore produced.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein preferred embodiments of the present invention are clearly shown.

lln the drawings:

Fig. 1 is an elevation of a four'cylinder engine showing two of the cylinders in vertical longitudinal section and showing one of the remaining cylinders with the draft sleeve partially removed. V

Fig. 2 shows a plan of the left-hand pair of cylinders shown in Fig. 1.

Fig. 3 is a horizontal section of two of the cylinders on the line 33 of Fig. 1.

Fig. 4 is a view similar to Fig. 2, showin a modification of the invention.

Fig. 5 is a plan view of one of the cylinders previous to attaching the fins, but prepared for welding.

In order to accomplish the objects of the present invention, in the production of an air cooled engine of the type illustrated, the cylinders are cast with the base plate 10 and the head 11, which head carries the exhaust and intake pipes 12 and 13 respectively, either as shown in Fig. 5 or as indicated in Fig. 2 by the dotted line 13' andthe structure to the right thereof. If the cylinder is cast with the intake and exhaust pipes as indicated in Fig. 2, a portion of the intake pipe is removed in a suitable fashion to leave the remaining portion in semi-cylindrical form as indicated in Fig. 5.

The cylinders so prepared, are then provided with suitable cooling elements or fins of another metal having a substantially higher heat conductivity as described in application Serial No. 392,646, filed June 29, 1920, by Charles F. Kettering on Engine cylinders or a continuation thereof filed November 9,1921, Serial No. 514,014: on Internal combustion engines, the form of finning illustrated being more particularly described and claimed in application Serial No. 417,095, filed October15, 1920 by the same inventor on Internalcombustion. engines. After the cooling elements have been applied to the cylinder, the base and intake pipes are ground off or otherwise suitably prepared for welding to a corresponding cylinder and two of these cylindersare placed together and welded. The two bases are welded together and the two halves of the common intake pipe are also welded. This gives a pair of cylinders having the rigidity and alignment of a pair of cylinders cast en bloc.

The welding may be carried out in any suitable fashion but it has been found that the usual autogenous Welding gives entirely satisfactory results.

Fig. 3 illustrates the appearance of the welded base of two cylinders.

In Fig. 2 there is shown a plan view of two cylinders in which the intake and exhaust pipes extend to the same side of the engine, while in Fig. t is shown a pair of cylinders in which the exhaust pipes 12 extend to one side of the engine while the intake pipe 13. extends to the opposite side.

While the present invention has been found particularly adapted to the form of cylinder described and claimed in the above mentioned application, it is not to be understood tl at it is limited thereto as it is intended to apply the present process to any form of cylinder. Further, while the present process has been described as being applicable to air cooled engines, nevertheless it is conceivable that good results might be obtained with cylinders of the water cooled type.

Further, while the present invention has been described particularly for producin engines in which the cylinders are arrange in pairs it is intended that it shall also be applied to producing engines in which the'entire series of cylinders shall be welded together to form a singleblock.

herein a own and described, constitutes a preferred embodiment of the invention, it .is

to be understood that other forms might be 5 adopted, all coming within the scope of the claims which follow.

What I claim is as follows: 1. Aninternal combustion engineeomrising pairs of cylinders, each cylinder 10 aving anexhaust pipe and at least onehalf of an intake pi integral with the head, the members 0 a pair havin their bases and their intake pipes wel ed together to form a pair of cylinders with a 15 common intake. e

2. Acylinder casting-"com rising a, base portion, a barrel portion an a head; the ead having integral therewith an exhaust pi e and substantially one-half of an inta e pipe, theha'lf'portion of intake pipe bei substantially semi-c lindrical.

8. e rocess of ucing a pair of cylinders or interns combustion engines which comprises casting two cylinders each placing the two vcylinders together with with a base portion and with a head earso rying an exhaust pipe and at least one-half I of an intake pipe; removing a portion of the intake pipe to leave substantially onehalf thereof in v semi-cylindrical form;

their base portions and intake pipes in contact; and welding the base portions and intake ipes.

4. internal combustion engine, including a pair of cylinders, each cy inder hav- 7 ing an exhaust ipe-and a portion of the wall of an in e-pipe inte l with the cylinder head, the members 0 the pair having their bases and their intake pipe per-'- tions welded together to form a pair of cylinders with a complete, common intake pipe.

In testimony whereof I hereto aflix my signature. V

CHARLES R. SHORT.

, Witnesses:

- Ronnn'r E. SMITH, v ALVINA C. Lnnmx. 

